cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A028992 Even 9-gonal (or enneagonal) numbers.

Table of values

n a(n)
0 0
1 24
2 46
3 154
4 204
5 396
6 474
7 750
8 856
9 1216
10 1350
11 1794
12 1956
13 2484
14 2674
15 3286
16 3504
17 4200
18 4446
19 5226
20 5500
21 6364
22 6666
23 7614
24 7944
25 8976
26 9334
27 10450
28 10836
29 12036
30 12450
31 13734
32 14176
33 15544
34 16014
35 17466
36 17964
37 19500
38 20026
39 21646
40 22200
41 23904

List of values

[0, 24, 46, 154, 204, 396, 474, 750, 856, 1216, 1350, 1794, 1956, 2484, 2674, 3286, 3504, 4200, 4446, 5226, 5500, 6364, 6666, 7614, 7944, 8976, 9334, 10450, 10836, 12036, 12450, 13734, 14176, 15544, 16014, 17466, 17964, 19500, 20026, 21646, 22200, 23904]